Return on Ad Spend (ROAS) is a crucial metric that can determine the success or failure of your campaigns. Setting the right target ROAS can be challenging but is essential for optimising your ad spend and maximising profitability. Too low, and you’re not making enough money; too high, and you’re missing out on valuable opportunities. In this blog post, we’ll explore what PPC ROAS is, why it matters, and how to select the right target ROAS for your Google Ads campaigns.
What is PPC ROAS?
PPC ROAS (Return on Ad Spend) stands for Return on Ad Spend in Pa Per Click advertising. It is a metric used to measure the revenue generated for every dollar spent on advertising. It’s calculated using the following formula:
ROAS = Revenue / Cost
For example, if you generated £500 in revenue from an ad campaign that cost you £100, your ROAS would be 5.0. This means that for every dollar spent on ads, you earned £5 in revenue.
Why is ROAS Important?
PPC ROAS is crucial because it helps you understand the effectiveness of your advertising campaigns. It tells you how much revenue you’re earning compared to what you’re spending. This insight can guide your budgeting decisions, helping you allocate resources to the most profitable campaigns and strategies.
A good ROAS ensures that your advertising efforts are not just generating traffic but are also profitable. It helps you strike a balance between spending too little (and potentially losing money) and spending too much (and missing out on profitable opportunities).
How to Select a Target ROAS
Choosing the right target ROAS is a strategic decision that requires careful consideration of various factors. Here are some key points to consider:
- Business Goals and Margins
- Understand your business goals. Are you aiming for growth, profitability, or market penetration?
- Calculate your profit margins. Knowing how much profit you make from each sale can help you determine a minimum acceptable ROAS.
- Industry Benchmarks
- Research industry benchmarks for ROAS. Different industries have different standards, and understanding these can provide a useful reference point.
- Campaign Objectives
- Define your campaign objectives clearly. Are you looking to drive sales, generate leads, or increase brand awareness? Different objectives may require different ROAS targets.
- Historical Data
- Analyse your historical campaign data. Look at past performance to identify trends and set realistic targets based on what has worked well previously.
- Cost Structure
- Consider your cost structure. If your products or services have high costs, you may need a higher ROAS to remain profitable.
- Competitive Landscape
- Assess the competitive landscape. In highly competitive industries, achieving a high ROAS can be more challenging, and you may need to adjust your targets accordingly.
- Google Ads Campaign Types
- Different types of Google Ads campaigns may require different ROAS targets. For instance, Performance Max (PMAX) campaigns can sometimes cannibalise traffic from other keywords in your account. Ensuring that your exact match keywords are prioritised can help maintain a balanced ROAS across different campaigns.
Balancing Target ROAS: Not Too High, Not Too Low
Finding the sweet spot for your target ROAS is all about balance. Here’s why:
- Too Low a Target: If your target ROAS is too low, you may not be covering your costs, leading to a loss. This scenario often means that your ad spend is not generating sufficient revenue to justify the investment.
- Too High a Target: On the other hand, if your target ROAS is set too high, you might be overly conservative with your spending. This can result in missed opportunities, as you may not be investing enough to capture a larger market share or drive more sales.
Diminishing Returns and ROAS
An important concept to understand when setting your target ROAS is diminishing returns. As you increase your ad spend, the incremental revenue generated from each additional dollar spent tends to decrease. This is because the most profitable opportunities are typically captured first, and additional spend reaches a broader, less targeted audience.

Above illustrates the concept of diminishing returns. As the ad spend increases, the incremental ROAS begins to decline, showing that each additional pound spent generates less revenue than the previous pound.
Practical Steps to Determine Your Target ROAS
- Set Clear Objectives: Define what you want to achieve with your PPC campaigns.
- Evaluate Your Margins: Understand your profit margins to set a baseline for your ROAS.
- Analyse Data: Use historical data to inform your decision.
- Test and Optimise: Continuously test different ROAS targets and optimise based on performance.
- Monitor and Adjust: Regularly monitor your campaigns and adjust your ROAS targets as needed based on real-time data and changing market conditions.
Conclusion
Selecting the right target ROAS is a dynamic process that requires a deep understanding of your business, industry, and marketing goals. By carefully considering your profit margins, campaign objectives, and competitive landscape, you can set realistic and effective ROAS targets that maximise your ad spend and drive profitable growth.
I’m here to help you navigate the complexities of PPC advertising and achieve your business goals. Contact me today to learn more about how I can optimise your Google Ads campaigns for the best possible return on your investment.